Symptoms:
vibration/chugging engine
strong smell of unburned gas from tailpipe
poor acceleration unless you really put it down hard
slow to start, 3 or 4 seconds of cranking before it starts
mileage down from 14 combined average to current 11.5
OBD 2 scan tool says 0172 and 0175, rich on both banks, no other codes appearing
So, I changed all plugs, cap, rotor, wires, all AC Delco parts, and NO CHANGE.
What would you do?
vibration/chugging engine
strong smell of unburned gas from tailpipe
poor acceleration unless you really put it down hard
slow to start, 3 or 4 seconds of cranking before it starts
mileage down from 14 combined average to current 11.5
OBD 2 scan tool says 0172 and 0175, rich on both banks, no other codes appearing
So, I changed all plugs, cap, rotor, wires, all AC Delco parts, and NO CHANGE.
What would you do?
Oct 11, 2015 at 7:58 PM